KN95 is a respirator certified by GB2626-2006, and it is a self-priming filter respirator in China's respiratory protection products. It corresponds to the American N95, which is the certification grade of American respirator and certified by the National Institute of Occupational Safety and Health. This mask can filter more than 95% non-oily particles under the specified air flow condition, so it is named n 95. If it can filter more than 99% of particles, it is called N95.
The protection levels of KN95 and N95 masks are similar, but they follow the testing standards of different countries. The KN95 mask follows the China standard, and the N95 mask follows the American standard, and the protective efficiency against non-oily particles is not less than 95%. Both KN95 and N95 masks include medical and non-medical masks. Among them, KN95/N95 masks with medical marks can be used as the first-line protection for medical staff during the anti-epidemic period, while masks without medical marks are not recommended for medical care.